Thermal sterility Flashcards
1
Q
What is the reference temperature for sterilisation?
A
121.1C
2
Q
What is the D value?
A
Time to reduce population by 90%
3
Q
What is recommended for commercial sterility?
A
12D cook
4
Q
What is z value?
A
Temperature range to reduce D values by 90%
5
Q
What is lethality?
A
Destruction at any temperature relative to 121C
6
Q
What is lethality as an equation?
A
L=D1/D2
7
Q
What is lethality as an equation using z value?
A
L=10^(T1-T2/z)
8
Q
What is F value?
A
Time required to produce lethality equivalent to that provided at 121.1C
9
Q
What is the formula for F value?
A
F=Ft^z
10
Q
What is Ft?
A
F value at a specific temperature
11
Q
What is F0?
A
F value when temperature is 121.1C and z value is 10C
12
Q
What is the F0 value for commercial sterility?
A
12
